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Topic Review (Newest First)
02-13-2005 08:40 PM
jimfulco H631P probably. It's a flat-top 350 piston with 1.56" compression height. They may be selling them under the Sterling name this month.

The FM site shows the H345 to have a compression height of 1.56", while their paper catalog from about 5 years ago shows it to be 1.54". Did they retool or what?
02-07-2005 09:50 PM
BoomerADF
Re: Speed pro Piston Help

Quote:
Originally posted by wickster
I need a little help...I am looking to find some piston specs on the FM website....its impossible.

Looking for data on H345NCP and H621...but can't find it on the website.

Any help will do.
According to summit.com

H345NCP
Vendor Speed Pro
Product Line Speed-Pro Hypereutectic Pistons
Bore (in) 4.000
Bore (mm) (Not Specified)
Piston Material Hypereutectic aluminum
Piston Style Flat
Compression Distance (in) 1.560
Dome Height (in) (Not Specified)
Dome Volume (cc) (Not Specified)
Dish Volume (cc) 5.00
Valve Reliefs Four
Wrist Pin Style Press fit
Pin Diameter (in) 0.9270
Top Ring Thickness 5/64 in.
Second Ring Thickness 5/64 in.
Oil Ring Thickness 3/16 in.
Quantity Sold individually.
Notes (Not Specified)

H621
They dont have anything that matches that.
02-07-2005 09:37 PM
wickster
Speed pro Piston Help

I need a little help...I am looking to find some piston specs on the FM website....its impossible.

Looking for data on H345NCP and H621...but can't find it on the website.

Any help will do.

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